S-92210A404 1-72 x 1/2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh environments and long-term reliability.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding, high-stress applications.
• Precise, secure fastening with Class 3A thread fit and UNF fine thread spacing, minimizing loosening under vibration.
• Efficient installation and flush seating thanks to the standard 82° countersink angle and hex drive design for easy torque application.
• Full thread engagement along the entire 1/2" length, providing maximum grip and load distribution in assemblies.
• Guaranteed dimensional accuracy and interchangeability, manufactured to meet stringent ASME B18.3 specifications.
• Environmentally compliant construction, adhering to RoHS 3 and REACH regulations for safe and sustainable use.

Professional Applications & Engineering Value

This 1-72 UNF Flat Head Screw is engineered to solve critical challenges in precision assemblies where space is limited and reliability is non-negotiable. The 18-8 Stainless Steel material, enhanced by a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it suitable for aerospace, electronics, and medical equipment applications. The Class 3A thread fit and fine thread spacing ensure a tight, secure connection that resists vibration-induced loosening, while the hex drive allows for high torque application without slippage. Its fully threaded design and flat head with an 82° countersink enable a flush, low-profile installation, preventing snagging and maintaining aerodynamic or aesthetic surfaces in finished products.

Specification Summary & Compliance

This screw adheres to ASME B18.3 dimensional standards, with a Class 3A thread fit for precise, high-quality threading. It features a UNF (Unified National Fine) thread form with a 1-72 thread size and right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use across global markets.